OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   1 d6 m2 n. s0 y+ t/ C2 P: j
2. /*
   
3. * edma_test.c
   + m# l" ?8 \" @* c" h
4. *
   5 b8 I, r5 {1 K0 a$ C
5. * brief  EDMA3 Test Application
   , J. c1 A- [) z/ m6 T" C
6. *
   
7. *   This file contains EDMA3 Test code.
   & p0 c+ ^$ B$ w; S1 y/ q9 p
8. *
   $ @4 a1 o8 l! n: m
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * x8 j8 R, x0 b2 K& w$ u& |4 E
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    # h# J: d1 e" C$ e
11. *         TO CHANGE.
    , u: V  T) e+ O% l4 y4 U/ I$ {
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 o! _' [! `( z  @
14. *
    
15. * This program is free software; you can redistribute it and/or
    , E9 \3 b, }9 J' S) W
16. * modify it under the terms of the GNU General Public License as
    + t% B1 j$ q  n( i. M
17. * published by the Free Software Foundation version 2.
    % E$ b1 l+ g9 Y! I# }) {
18. *
    - F5 ^- X9 L. s; O( }
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    1 @* I$ F, b, a/ Z+ a
20. * kind, whether express or implied; without even the implied warranty
    3 m- Z+ G% L* `2 P% V3 }; V
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; p- ]! T' g4 a' Y* r
22. * GNU General Public License for more details.
    
23. */
    7 I/ v: ^1 C/ I$ c" j
24. 
    / z2 V* R# I% }$ h
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # J1 K: [5 v' N4 C! c
28. #include <linux/types.h>
    7 G3 B' u. Z$ i* F% V% j
29. #include <linux/interrupt.h>
    8 F) i3 R$ p: a' R' i% b
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    " g, C" c$ O- ], d' C! u$ a- ?
32. #include <linux/sysctl.h>
    & u3 G, s8 V7 K
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    . a9 k; Q! \0 d4 Z& o
35. 
    # d# r% a, P7 `; Q
36. #include <mach/memory.h>
    ' I. G1 x3 M7 s) b! z
37. #include <mach/hardware.h>
    + r2 d: ?" J* V
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    2 }; M/ ^  E. H
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    " I: W4 H6 _3 @- L! M; s; V
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    2 N6 D  N0 S7 M! ]. j; i& n+ K0 [- }8 _
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    # G$ g7 ~/ k2 \/ a. B( q+ Z  ]
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    + a1 k/ }. p1 {# A
55. #define STATIC_SHIFT                3
    9 |% {- \1 H- P' T' w1 F! F
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    $ k/ M% y* {5 ]& r
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    % C/ Y" |. h3 z! R/ F: M7 }
63. 
    . s$ h- }( J5 l; e! G: h
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 k- C- O7 o$ X6 g! E( a& `
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 n  v5 C' S- W
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
      M6 Z3 a2 \8 E! d9 H
69. dma_addr_t dmaphyssrc2 = 0;
    1 N( E' \9 T8 R, w# T3 a2 y
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    - o( {4 d3 |$ r! l
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    0 M; y5 B% @1 P$ q% {
76. char *dmabufdest2 = NULL;
    ) Y. v$ d. Y5 Q7 _) o2 r4 |- Q
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    0 H; M9 i& m; M. G, g( o0 T+ d: S2 h
80. static int ccnt = 8;
    & f+ u, _6 `* \+ i0 g% [, W
81. 
    / |( e4 u) a8 N1 q
82. module_param(acnt, int, S_IRUGO);
    9 e7 f/ ]$ t; q1 m/ Z
83. module_param(bcnt, int, S_IRUGO);
      b( `3 O4 m" L! e; i+ q4 t
84. module_param(ccnt, int, S_IRUGO);

复制代码

! K, R# j  u8 f( ^. {# B* r$ ~
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
: }4 B0 y( H3 rarm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
' y0 N7 j2 l$ ~& t  T     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

" @; u# Q; c" H7 f+ ?
" h. t/ m0 v' ?* U  X: Q* F- J